Correct me if im wrong

Just past 4 weeks into flower with some Maui and Papaya. The other day i noticed some yellowing and crispy leaves. This happened a couple days after i switched reservoirs. The water (from my well) was still really cold and ph was a little high too. I also think i have been over watering. I run 3000w in a 10x12 room in a hydro setup. My water sched was 30 min on every 2 hours +-. I have backed the watering down to 15min every 3-4 hours and added a small fan to airate the roots for a couple days. What would be a generic water sched for that kind of light ?

What is your temperature at.....in your room.

80-90 days 65-75 night

I would think your revised water schedule should be about right......those temps sound good....

I would keep an eye on your Ph and watch your nutes...... and see what happens with your new water schedule.....